'Dancing With the Stars' 'Bachelor' Sean Lowe ... HUGE Diva

3/24/2013 6:05 AM PDT

'Bachelor' Sean Lowe -- HUGE Diva on Set of 'Dancing with the Stars'

EXCLUSIVE

With every new season of "Dancing with the Stars" ... a new diva shall emerge amongst the cast ... and this season it's "The Bachelor" Sean Lowe. Sorry ladies.

Sources close to "DWTS" tell TMZ ... ever since filming began, Sean has caught a baaaad case of DIVA-itis ... demanding to be shot from certain camera angles, talking down to crew members, acting like a brat and bragging to other cast members, "This show NEEDS me."

We're told Sean's ego has gotten so big ... he now considers himself a brand and must "market accordingly".

As for other cast members ... we're told they've already started brainstorming nicknames for the reality star in light of his behavior -- like Princess Sean -- but have yet to find just the right one.

We could probably think of a couple.

FYI -- The executive producer of "DWTS," Conrad Green, tells TMZ, "Sean is a pleasure and there is nothing diva-like about him."